Zebibyte

Multiples of bytes
Decimal Value Metric 1000 kB kilobyte 1000^2 MB megabyte 1000^3 GB gigabyte 1000^4 TB terabyte 1000^5 PB petabyte 1000^6 EB exabyte 1000^7 ZB zettabyte 1000^8 YB yottabyte	Binary Value IEC JEDEC 1024 KiB kibibyte KB kilobyte 1024^2 MiB mebibyte MB megabyte 1024^3 GiB gibibyte GB gigabyte 1024^4 TiB tebibyte – 1024^5 PiB pebibyte – 1024^6 EiB exbibyte – 1024^7 ZiB zebibyte – 1024^8 YiB yobibyte –
Orders of magnitude of data

The zebibyte is a multiple of the unit byte for digital information. It is a member of the set of units with binary prefixes defined by the International Electrotechnical Commission (IEC). Its unit symbol is ZiB.

The prefix zebi (symbol Zi) represents multiplication by 1024⁷, therefore:

1 zebibyte = 2⁷⁰ bytes = 1180591620717411303424bytes = 1024 exbibytes

The prefix zebi was originally not part of the system of binary prefixes, but was added together with the prefix yobi by the IEC in August 2005.^[1]

Usage examples

• GUID Partition Table (GPT) allows for a maximum disk and partition size of 8 zebibytes, or 9.4 zettabytes, when using 512-byte sectors.^[2][3]
• The ZFS filesystem has a theoretical volume size limit of 256 zebibytes.

See also

• IEC 80000-13
• IEEE 1541
• Orders of magnitude (data)
• SI prefix
• Zebibit

References

1. News & views from the IEC June 2012
2. "FAQ: Drive Partition Limits" (PDF). UEFI Forum. 2010-06-09. Retrieved 2013-05-29.
3. Roderick W. Smith (2012-07-03). "Make the most of large drives with GPT and Linux". IBM. Retrieved 2013-05-29. Disk pointers are 64 bits in size, meaning that GPT can handle disks of up to 512 x 264 bytes (8 zebibytes, or 8.6 billion TiB), assuming 512-byte sectors.